We R Memory Keepers™ Precision glass cutting mat is made from tempered glass for added durability and comes with a smooth 13" surface for precise cutting which is easy clean up.We R Memory Keepers™ Precision glass cutting mat features non-skid feet and durable work surface which makes it perfect for cutting, stamping, scrapbooking. Mat can be used to look for angle measurement lines, in addition to both and metric markings.